Home / 3,897.81-5,379.44-2,219.62

Finding the Fourth Proportional to 3,897.81, 5,379.44 and 2,219.62

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Solution

The fourth proportional to 3,897.81, 5,379.44 and 2,219.62 is: 3,063.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,897.81 : 5,379.44 = 2,219.62 : x
  2. Step 2: Convert to fraction form
    3,897.81/5,379.44 = 2,219.62/x
  3. Step 3: Cross multiply
    3,897.81x = 5,379.44 × 2,219.62
  4. Step 4: Simplify right side
    3,897.81x = 11,940,312.61
  5. Step 5: Solve for x
    x = 11,940,312.61/3,897.81
  6. Step 6: Final answer
    x = 3,063.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.